/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.pulsar;

import org.apache.iotdb.rpc.IoTDBConnectionException;
import org.apache.iotdb.rpc.StatementExecutionException;
import org.apache.iotdb.session.pool.SessionPool;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.pulsar.client.api.Consumer;
import org.apache.pulsar.client.api.Message;
import org.apache.pulsar.client.api.Messages;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class PulsarConsumerThread implements Runnable {

    private static final Logger logger = LoggerFactory.getLogger(PulsarConsumerThread.class);

    private final Consumer<?> consumer;

    private SessionPool pool;

    public PulsarConsumerThread(Consumer<?> consumer, SessionPool pool)
            throws ClassNotFoundException {
        this.consumer = consumer;
        Class.forName("org.apache.iotdb.jdbc.IoTDBDriver");
    }

    /**
     * insert data to IoTDB
     */
    private void insert(String data) throws IoTDBConnectionException, StatementExecutionException {
        String[] dataArray = data.split(",");
        String device = dataArray[0];
        long time = Long.parseLong(dataArray[1]);
        List<String> measurements = Arrays.asList(dataArray[2].split(":"));
        List<TSDataType> types = new ArrayList<>();
        for (String type : dataArray[3].split(":")) {
            types.add(TSDataType.valueOf(type));
        }

        List<Object> values = new ArrayList<>();
        String[] valuesStr = dataArray[4].split(":");
        for (int i = 0; i < valuesStr.length; i++) {
            switch (types.get(i)) {
                case INT64:
                    values.add(Long.parseLong(valuesStr[i]));
                    break;
                case DOUBLE:
                    values.add(Double.parseDouble(valuesStr[i]));
                    break;
                case INT32:
                    values.add(Integer.parseInt(valuesStr[i]));
                    break;
                case TEXT:
                    values.add(valuesStr[i]);
                    break;
                case FLOAT:
                    values.add(Float.parseFloat(valuesStr[i]));
                    break;
                case BOOLEAN:
                    values.add(Boolean.parseBoolean(valuesStr[i]));
                    break;
            }
        }

        pool.insertRecord(device, time, measurements, types, values);
    }

    /**
     * insert data to IoTDB
     */
    private void insertDatas(List<String> datas)
            throws IoTDBConnectionException, StatementExecutionException {
        int size = datas.size();
        List<String> deviceIds = new ArrayList<>(size);
        List<Long> times = new ArrayList<>(size);
        List<List<String>> measurementsList = new ArrayList<>(size);
        List<List<TSDataType>> typesList = new ArrayList<>(size);
        List<List<Object>> valuesList = new ArrayList<>(size);
        for (String data : datas) {
            String[] dataArray = data.split(",");
            String device = dataArray[0];
            long time = Long.parseLong(dataArray[1]);
            List<String> measurements = Arrays.asList(dataArray[2].split(":"));
            List<TSDataType> types = new ArrayList<>();
            for (String type : dataArray[3].split(":")) {
                types.add(TSDataType.valueOf(type));
            }

            List<Object> values = new ArrayList<>();
            String[] valuesStr = dataArray[4].split(":");
            for (int i = 0; i < valuesStr.length; i++) {
                switch (types.get(i)) {
                    case INT64:
                        values.add(Long.parseLong(valuesStr[i]));
                        break;
                    case DOUBLE:
                        values.add(Double.parseDouble(valuesStr[i]));
                        break;
                    case INT32:
                        values.add(Integer.parseInt(valuesStr[i]));
                        break;
                    case TEXT:
                        values.add(valuesStr[i]);
                        break;
                    case FLOAT:
                        values.add(Float.parseFloat(valuesStr[i]));
                        break;
                    case BOOLEAN:
                        values.add(Boolean.parseBoolean(valuesStr[i]));
                        break;
                }
            }
            deviceIds.add(device);
            times.add(time);
            measurementsList.add(measurements);
            typesList.add(types);
            valuesList.add(values);
        }

        pool.insertRecords(deviceIds, times, measurementsList, typesList, valuesList);
    }

    @SuppressWarnings("squid:S2068")
    @Override
    public void run() {
        try {
            do {
                Messages<?> messages = consumer.batchReceive();
                List<String> datas = new ArrayList<>(messages.size());
                for (Message<?> message : messages) {
                    datas.add(new String(message.getData()));
                }
                insertDatas(datas);
                consumer.acknowledge(messages);
            } while (true);
        } catch (Exception e) {
            logger.error(e.getMessage());
        }
    }
}
